2101420321 has 24 divisors (see below), whose sum is σ = 2871880704. Its totient is φ = 1511506080.

The previous prime is 2101420297. The next prime is 2101420327. The reversal of 2101420321 is 1230241012.

It is not a de Polignac number, because 2101420321 - 2⁵ = 2101420289 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2101420295 and 2101420304.

It is not an unprimeable number, because it can be changed into a prime (2101420327) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 142945 + ... + 156958.

It is an arithmetic number, because the mean of its divisors is an integer number (119661696).

Almost surely, 2^2101420321 is an apocalyptic number.

It is an amenable number.

2101420321 is a deficient number, since it is larger than the sum of its proper divisors (770460383).

2101420321 is a wasteful number, since it uses less digits than its factorization.

2101420321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299941 (or 299934 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2101420321 is about 45841.2513027295. The cubic root of 2101420321 is about 1280.8678036513.

Adding to 2101420321 its reverse (1230241012), we get a palindrome (3331661333).

The spelling of 2101420321 in words is "two billion, one hundred one million, four hundred twenty thousand, three hundred twenty-one".